Insulator-support.



PATENTED APR. 7, 190

1 nn m mm. mm hu Lu 8% N I APPLICATION FILED AUG. 19 190"!- UNITED sings; PATENT OFFICE.

CHARLES L. PEIRCE, in, or ELKHART, INDIANA, ASSIGNOR T-OTEIRCE OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

msULA'roR-sUPPoR'r. I

Specification of Letters Patent.

Patented April 7, 1908.

Application filed August 19, 1907. Serial N 0. 389,277.

struction of support for the coil spring on glass insulator proper is supwhich the usual ported.

The main object of the invention is to provide a simple, economical, easily constructed,

" and eflicient device of the character specia channel, angle, or other the diameter of the spring employed in each fied, and to this end the invention consists in the novel construction and comb nation of parts as hereinafter more particularly described and pointed out in the claims.

Insulators of that type wherein the glass cap or insulator proper is mounted on a standard through the intervention of a coil spring engaging a spirally rooved or threaded internal surface of the v ass cap are old in the art and are typically shown by prior patents granted to me on the 11th day of June, 1907, Nos. 856,488 and 856,801. The manufacture of insulators ,of this class requires drilling, slotting, grooving or other metal cutting or boring operations to be performed on the bracket or post forming the support to form an anchorage forthe coil spring that carries the insulator proper; and a leading advantage of my present construction resides in the f act that none of these operations are re 'uired therein, the anchorage of the spring eing supplied by means of a narrow inverted U-sha ed member that is secured to a bracket whicli preferably takes the form of a plain rod or 0st with its closed end projecting above t 1e upper end of the latter for a distance substantially equal to the length of the spring e111 loyed and constituting in effect a narrow 00) between the sides of which the transverse y bent ends of the surrounding spring are inserted. Prior constructions have also, so far as I am aware, limited the cross-sectional dimensions of the upright support carrying the spring, whether form of upright, to

case Whereas in my present construction a post of any cross-sectional form or dimenmetal stri p sions whatever may be used in combination SPECIALTY COMPANY- with the spring-supportinglo'op member that is mounted thereon. In its simplest, cheapest and preferred form the spring supporting member is made by sim ly bending double onitself at its longitudina center a malleable with its two sidesor sections spaced su iciently to admit the ends of the spring between them, and said sides or sec-- tions being suitably secured to the rod or )ost.

I The invention will be readily understood in respect to all of its details of structure.

when considered in connection with the accompanying drawing which illustrates a preferred form thereof and in which,"

- Figure 1 is a side elevational View of the complete device, the same being shown as mounted upon an arm of a telegraph or telephone pole. Fig. 2 is a top plan viewof the same. Fig. 3 is a side elevational view of the upper end of the su port in a plane at right angles to that of ,ig. 1. Fig. 4 is;a cross-sectional view on the line 4-4 of Fig. 1. Referring to thedrawings, 5'designates the end portion'of an ordinary wooden arm of a telegraph or telephone pole, the same having a vertical transverse apcrtureindicated at 6, receiving the lower portion'of an upright bracket herein shown as a metal rod or post 7.

8 designates as an entirety a metal strip of concave-convex form in cross-section that is bent double on itself at its longitudinal center and secured to the upwardly rejecting portion of the post 7 as by we din braz ng, soldering, or in any other suitab e manner. The parallel sections of the strip 8 thus formed have a transverse extent or length of are somewhat less than one-half of the circle defined by a cross-section of the post 7, as

plainly shown in Fig. 4; so that the edges of the sections do not meet around the post but are separated or spaced thereby, formingin effect above the post a longitudinal slot 9 which is closed at its upper end by the metal at the bend constituting the transverseconmotion 10 of'the two parallel sides or see tions, the portion of the bent strip above the i post thus constituting a narrow verticalloop designated by 11. Surrounding this loop is a coil spring 12, the upper and-lower ends 13 and 14 of which are bent diametrically of the spring and are passed between the sides of t e loop, the upper end lying directly'beneath the transverse connecting member 10 .of the loop and the lower end resting upon the up er end of the post 7. It will thus be seen t at the sprin is very securely held against yielding or isplacement in any direction, the engagement of the transverse end portions 13 and 14 with the upper ends of the loop and post, respectively, preventing longitudinal displacement and their engagement with the sides of the loop preventing any rotary movement of the spring. The

glass cap or insulator proper is screwed onto the sprin thus supported, in the usual manner. ashers 15 and 16 are preferably applied to the post above and below the arm 5, as shown; t e lower ends of the parallel sides or sections of the strip 8 resting u on the upper washer 15, and the lower en of the post being threaded as shown at 17, to receive a nut 18 screwed against the under side of the lower washer 16. The washers 15 and 16 may, of course, be omitted, if desired, and the specific cross-sectional vor other forms of the post and spring-engaging strip may ch:

of said loop member, substantially as described.

2. An insulator support comprising in combination a post, a wrought metal strip bent double on itself at its longitudinal center and secured to said post with its closed end projecting above the top of the latter, and a coil spring surrounding the projecting end of said strip and having its end portions bent transversely and inserted between the sides of said strip, substantially as described.

3. An insulator support comprising in combination a post of curved form in crosssection, a wrought metal strip likewise of curved. form in cross-section bent double on itself at its longitudinal center and embracin and secured to said post, the parallel si es of said bent strip being s aced and pro jecting be ond the u per en of said post,

and a coi spring em racing the projecting end of said bent strip and having its end portions bent transversely andinserted between the sides .of said projecting portion, said spring ends also engaging .the upper end of said post and the transverse connecting portion of said bent strip whereby said spring is supported against ongitudinal displacement, substantially as described.

In testimon that I claim the foregoing as my invention, have hereunto subscribed my name in the presence of two witnesses' CHARLES L. PEI'RCE, JR. Witnesses:

SAMUEL N. POND, FREDERICK C. GOODWIN. 

